import time

#练习生：跳舞，唱歌，打篮球

def singing():
    for i in range(3):
        print("正在唱歌...",i)
        time.sleep(0.5)
        
def dancing():
    for i in range(3):
        print("正在跳舞...",i)
        time.sleep(0.5)
if __name__ == '__main__':
    singing()
    dancing()